Seagate 1TB Barracuda User manual

Brand: Seagate

Model: 1TB Barracuda

Category: Internal hard drives

Type: User manual

This manual is also suitable for

Product Manual

Barracuda 7200.12 Serial ATA

100529369

Rev. G

February 2010

ST31000528AS

ST3750528AS

ST3500418AS

ST3500410AS

ST3320418AS

ST3250318AS

ST3160318AS

Revision history

Publication number: 100529369, Rev. G, February 2010

Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC

in the United States and/or other countries. Barracuda, SeaTools and SeaTDD are either trademarks or

registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States

and/or other countries. All other trademarks or registered trademarks are the property of their respective

owners.

When referring to drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB,

equals one trillion bytes. Your computer's operating system may use a different standard of measurement

and report a lower capacity. In addition, some of the listed capacity is used for formatting and other func

tions, and thus will not be available for data storage. Seagate reserves the right to change, without notice,

product offerings or specifications.

Revision Date Sheets affected or comments

Rev. A 08/15/08 Initial release.

Rev. B 02/12/09 fc, 1, 3-19, 22-25, 29-30 and 37.

Rev. C 04/03/09 11.

Rev. D 09/01/09

28.(add command ‘write uncorrectable - 45h’); 30.(words 75 & 81 code

edits)

Rev. E 10/14/09 Updated Write DMA FUA Extended command on page 28.

Rev. F 11/18/09

Updated drive specifications on Tables 1 thru 3. Added “Warranty”

specific section.

Rev. G 02/24/10 Updated non-operating vibration specifications throughout.

Barracuda 7200.12 Serial ATA Product Manual, Rev. G i

Contents

1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.5 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.6 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.7 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.7.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.7.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.7.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.7.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.8 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.8.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.8.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.9 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.9.1 Test for Prominent Discrete Tones (PDTs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.10 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.11 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.12 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.12.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.12.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.12.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.13 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.13.1 European Union Restriction of Hazardous Substances (RoHS) Directive. . . . . 20

2.13.2 China Restriction of Hazardous Substances (RoHS) Directive . . . . . . . . . . . . 20

2.14 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.1 Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.2 Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.3 Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3.3 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

ii Barracuda 7200.12 Serial ATA Product Manual, Rev. G

Barracuda 7200.12 Serial ATA Product Manual, Rev. G iii

List of Figures

Figure 1. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 2. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 3. Mounting dimensions (1000 and 750GB models). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 4. Mounting dimensions (500, 320, 250 and 160GB models). . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 1

1.0 Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate

Barracuda

7200.12 Serial ATA model drives:

These drives provide the following key features:

• 7200 RPM spindle speed.

• High instantaneous (burst) data-transfer rates (up to 300MB per second).

• Perpendicular recording technology provides the drives with increased areal density.

• State-of-the-art cache and on-the-fly error-correction algorithms.

• Native Command Queueing with command ordering to increase performance in demanding applications.

• Full-track multiple-sector transfer capability without local processor intervention.

• Quiet operation.

• Compliant with RoHS requirements in China and Europe.

• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.

• Support for S.M.A.R.T. drive monitoring and reporting.

• Supports latching SATA cables and connectors.

• Worldwide Name (WWN) capability uniquely identifies the drive.

ST31000528AS ST3500418AS ST3320418AS ST3160318AS

ST3750528AS ST3500410AS ST3250318AS

2 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

1.1 About the Serial ATA interface

The Serial ATA interface provides several advantages over the traditional (parallel) ATA interface. The primary

advantages include:

• Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jump-

ers or other configuration options.

• Thinner and more flexible cabling for improved enclosure airflow and ease of installation.

• Scalability to higher performance levels.

In addition, Serial ATA makes the transition from parallel ATA easy by providing legacy software support. Serial

ATA was designed to allow you to install a Serial ATA host adapter and Serial ATA disk drive in your current

system and expect all of your existing applications to work as normal.

The Serial ATA interface connects each disk drive in a point-to-point configuration with the Serial ATA host

adapter. There is no master/slave relationship with Serial ATA devices like there is with parallel ATA. If two

drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they

were both “masters” on two separate ports. This essentially means both drives behave as if they are Device 0

(master) devices.

Note. The host adapter may, optionally, emulate a master/slave environment to host software where two

devices on separate Serial ATA ports are represented to host software as a Device 0 (master) and

Device 1 (slave) accessed at the same set of host bus addresses. A host adapter that emulates a

master/slave environment manages two sets of shadow registers. This is not a typical Serial ATA

environment.

The Serial ATA host adapter and drive share the function of emulating parallel ATA device behavior to provide

backward compatibility with existing host systems and software. The Command and Control Block registers,

PIO and DMA data transfers, resets, and interrupts are all emulated.

The Serial ATA host adapter contains a set of registers that shadow the contents of the traditional device regis-

ters, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For addi-

tional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA International

Organization: Serial ATA Revision 3.0”. The specification can be downloaded from www.sata-io.org.

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 3

2.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal

power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the

following drive models:

Specification summary tables

The specifications listed in the following tables are for quick reference. For details on specification measure-

ment or definition, see the appropriate section of this manual.

ST31000528AS ST3500418AS ST3320418AS ST3160318AS

ST3750528AS ST3500410AS ST3250318AS

4 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

Table 1: Drive specifications summary for 1000 and 750GB models

Drive specification ST31000528AS ST3750528AS

Formatted capacity (512 bytes/sector)* 1000GB 750GB

Guaranteed sectors 1,953,525,168 1,465,149,168

Heads 4 3

Disks 2

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density (max) 1413kb/in

Track density (avg) 236 ktracks/in

Areal density (avg) 329Gb/in

Spindle speed 7200 RPM

Internal data transfer rate (max) 1695Mb/s

Sustained data transfer rate OD (max) 125MB/s

I/O data-transfer rate (max) 300MB/s

ATA data-transfer modes supported PIO modes: 0 to 4

Multiword DMA modes: 0 to 2

Ultra DMA modes: 0 to 6

Cache buffer 32MB

Height (max.) 26.1mm / 1.028 in

Width (max.) 101.6mm /4.0 in (+ 0.010 in)

Length (max.) 146.99mm / 5.787 in

Weight (typical) 622g /1.371 lb

Average latency 4.16ms

Power-on to ready (max.) <10.0s

Standby to ready (max.) <10.0s

Track-to-track seek time (typical) <1.0ms read

<1.2ms write

Average seek, read (typical)

Average seek, write (typical)

<8.5ms typical

<9.5ms typical

Startup current (typical) 12V (peak) 2.0A

Voltage tolerance (including noise) 5V +10% / -7.5%

12V +10% / -7.5%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (non-operating)

Temperature gradient 20°C per hour max (operating)

30°C per hour max (non-operating)

Relative humidity 5% to 95% (operating)

5% to 95% (non-operating)

Relative humidity gradient (max.) 30% per hour

Wet bulb temperature (max.) 37.7°C max (operating)

40.0°C max (non-operating)

Altitude, operating –304.8m to 3,048m

(–1000 ft to 10,000+ ft)

Altitude, non-operating

(below mean sea level, max)

–304.8m to 12,192m

(–1000 ft to 40,000+ ft)

Operational Shock (max) 70 Gs at 2ms

Non-Operational Shock (max) 300 Gs at 2ms

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 5

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, operating 2Hz to 22Hz: 0.25 Gs, Limited displacement

22Hz to 350Hz: 0.50 Gs

350Hz to 500Hz: 0.25 Gs

Vibration, non-operating 5Hz to 22Hz: 3.0 Gs

22Hz to 350Hz: 3.0 Gs

350Hz to 500Hz: 3.0 Gs

Drive acoustics, sound power

Idle** 2.6 bels (typical)

2.7 bels (max)

Seek 2.8 bels (typical)

3.0 bels (max)

Non-recoverable read errors 1 per 10

bits read

Warranty To determine the warranty for a specific drive, use a web browser to access the following

web page:

support.seagate.com/customer/warranty_validation.jsp

From this page, click on the “Verify Your Warranty” link. You will be asked to provide the

drive serial number, model number (or part number) and country of purchase. The system

will display the warranty information for your drive.

Contact start-stop cycles 50,000 at 25°C, 50% rel. humidity

Supports Hotplug operation per the

Serial ATA Revision 2.5 specification

Yes

Drive specification ST31000528AS ST3750528AS

6 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

Table 2: Drive specifications summary for 500GB models

Drive specification ST3500418AS and ST3500410AS ST3320418AS

Formatted capacity (512 bytes/sector)* 500GB 320GB

Guaranteed sectors 976.773,168 625,142,448

Heads 2

Disks 1

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density (max.) 1413kb/in

Track density (avg.) 236 ktracks/in

Areal density (avg.) 329Gb/in

Spindle speed 7200 RPM

Internal data transfer rate (max) 1695Mb/s

Sustained data transfer rate OD (max) 125MB/s

I/O data-transfer rate (max.) 300MB/s

ATA data-transfer modes supported PIO modes: 0 to 4

Multiword DMA modes: 0 to 2

Ultra DMA modes: 0 to 6

Cache buffer 16MB

Height (max) 19.98mm / 0.787 in

Width (max) 101.6mm / 4.0 in (+ 0.010 in)

Length (max) 146.99mm / 5.787 in

Weight (typical) 415g / 0.915 lb

Average latency 4.16ms

Power-on to ready (max) <8.5s

Standby to ready (max) <8.5s

Track-to-track seek time (typical) <1.0ms read;

<1.2ms write

Average seek, read (typical) <8.5ms

Average seek, write (typical) <9.5ms

Startup current (typical) 12V (peak) 2.0A

Voltage tolerance (including noise) 5V +10% / -7.5%

12V +10% / -7.5%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (non-operating)

Temperature gradient 20°C per hour max (operating)

30°C per hour max (non-operating)

Relative humidity 5% to 95% (operating)

5% to 95% (non-operating)

Relative humidity gradient (max) 30% per hour

Wet bulb temperature (max) 37.7°C (operating)

40.0°C (non-operating)

Altitude, operating –304.8m to 3,048m

(–1000 ft to 10,000+ ft)

Altitude, non-operating

(below mean sea level, max)

–304.8m to 12,192m

(–1000 ft to 40,000+ ft)

Operational Shock (max) 70 Gs at 2ms

Non-Operational Shock (max) 350 Gs at 2ms

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 7

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, operating 2Hz to 22Hz: 0.25 Gs, Limited displacement

22Hz to 350Hz: 0.50 Gs

350Hz to 500Hz: 0.25 Gs

Vibration, non-operating 5Hz to 22Hz: 3.0 Gs

22Hz to 350Hz: 3.0 Gs

350Hz to 500Hz: 3.0 Gs

Drive acoustics, sound power

Idle** 2.6 bels (typical)

2.7 bels (max)

Seek 2.8 bels (typical)

3.0 bels (max)

Non-recoverable read errors 1 per 10

bits read

Warranty To determine the warranty for a specific drive, use a web browser to access the following

web page:

support.seagate.com/customer/warranty_validation.jsp

From this page, click on the “Verify Your Warranty” link. You will be asked to provide the

drive serial number, model number (or part number) and country of purchase. The sys

tem will display the warranty information for your drive.

Contact start-stop cycles 50,000 at 25°C, 50% rel. humidity

Supports Hotplug operation per the

Serial ATA Revision 2.5 specification

Yes

Drive specification ST3500418AS and ST3500410AS ST3320418AS

8 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

Table 3: Drive specifications summary for 250GB models

Drive specification ST3250318AS ST3160318AS

Formatted capacity (512 bytes/sector)* 250GB 160GB

Guaranteed sectors 488,397,168 312,581,808

Heads 1

Disks 1

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density (max.) 1413kb/in

Track density (avg.) 236 ktracks/in

Areal density (avg.) 329Gb/in

Spindle speed 7200 RPM

Internal data transfer rate (max.) 1695Mb/s

Sustained data transfer rate OD (max.) 125MB/s

I/O data-transfer rate 300MB/s

ATA data-transfer modes supported PIO modes: 0 to 4

Multiword DMA modes: 0 to 2

Ultra DMA modes: 0 to 6

Cache buffer 8MB

Height (max.) 19.98mm / 0.787 in

Width (max.) 101.6mm / 4.0 in ( + 0.010 in)

Length (max.) 146.99mm / 5.787 in

Weight (typical) 415g / 0.915 lb

Average latency 4.16ms

Power-on to ready (max.) <8.5s

Standby to ready (max.) <8.5s

Track-to-track seek time (typical) <1.0ms (read)

<1.2ms (write)

Average seek, read (typical)

Average seek, write (typical)

<8.5ms (read)

<9.5ms (write)

Startup current (typical) 12V (peak) 2.0A

Voltage tolerance (including noise) 5V +10% / -7.5%

12V +10% / -7.5%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (non-operating)

Temperature gradient (max.) 20°C per hour (operating)

30°C per hour (non-operating)

Relative humidity 5% to 95% (operating)

5% to 95% (non-operating)

Relative humidity gradient (max.) 30% per hour

Wet bulb temperature 37.7°C max (operating)

40.0°C max (non-operating)

Altitude, operating –60.96m to 3,048m

(–1000 ft to 10,000+ ft)

Altitude, non-operating

(below mean sea level, max.)

–60.96m to 12,192m

(–1000 ft to 40,000+ ft)

Operational Shock (max.) 70 Gs at 2ms

Non-Operational Shock (max.) 350 Gs at 2ms

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 9

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, operating 2Hz to 22Hz: 0.25 Gs, Limited displacement

22Hz to 350Hz: 0.50 Gs

350Hz to 500Hz: 0.25 Gs

Vibration, non-operating 5Hz to 22Hz: 3.0 Gs

22Hz to 350Hz: 3.0 Gs

350Hz to 500Hz: 3.0 Gs

Drive acoustics, sound power

Idle** 2.6 bels (typical)

2.7 bels (max)

Seek 2.8 bels (typical)

3.0 bels (max)

Non-recoverable read errors 1 per 10

bits read

Warranty To determine the warranty for a specific drive, use a web browser to access the following

web page:

support.seagate.com/customer/warranty_validation.jsp

From this page, click on the “Verify Your Warranty” link. You will be asked to provide the

drive serial number, model number (or part number) and country of purchase. The system

will display the warranty information for your drive.

Contact start-stop cycles 50,000 at 25°C, 50% rel. humidity

Supports Hotplug operation per the

Serial ATA Revision 2.5 specification

Yes

Drive specification ST3250318AS ST3160318AS

10 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

2.1 Formatted capacity

Model

Formatted

capacity*

Guaranteed

sectors

Bytes per sector

ST31000528AS 1000GB 1,953,525,168

512

ST3750528AS 750GB 1,465,149,168

ST3500418AS

ST3500410AS

500GB 976,773,168

ST3320418AS 320GB 625,142,448

ST3250318AS 250GB 488,397,168

ST3160318AS 160GB 312,581,808

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

2.1.1 LBA mode

When addressing these drives in LBA mode, all blocks (

sectors) are consecutively numbered from 0 to n–1,

where n is the number of guaranteed sectors as defined above.

See Section 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-

bit addressing support of drives with capacities over 137GB.

2.2 Default logical geometry

Cylinders Read/write heads Sectors per track

16,383 16 63

LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,

where n is the number of guaranteed sectors as defined above.

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 11

2.3 Recording and interface technology

Interface Serial ATA (SATA)

Recording method Perpendicular

Recording density (kbits/inch max) 1413

Track density (ktracks/inch avg) 236

Areal density (Gbits/inch

avg) 329

Spindle speed (RPM) 7,200 ± 0.2%

Internal data transfer rate (Mbits/sec max) 1695

Sustained data transfer rate (Mbytes/sec max) 125

I/O data-transfer rate (Mbytes/sec max) 300

2.4 Physical characteristics

Maximum height

1000 and 750GB models 26.1mm / 1.028 in

500, 320, 250 and 160GB models 19.98mm / 0.787 in

Maximum width 101.6mm / 4.000 (

+ 0.010 in)

Maximum length 146.99mm / 5.787 in

Typical weight

1000 and 750GB models 622g / 1.371 lb

500, 320, 250 and 160GB models 415g / 0.915 lb

Cache buffer

1000 and 750GB models 32MB (32,768kb)

500 and 320GB models 16MB (16,384kb)

250 and 160GB models 8MB (8,192kb)

12 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

2.5 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using

drive diagnostics. The specifications in the table below are defined as follows:

• Track-to-track seek time is an average of all

possible single-track seeks in both directions.

• Average seek time is a true statistical random average of at least 5,000 measurements of seeks between

andom tracks, less overhead.

Typical seek times (ms) Read Write

Track-to-track 1.0 1.2

Average 8.5 9.5

Average latency: 4.16

Note. T

hese drives are designed to consistently meet the seek times represented in this manual. Physical

seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted

values. However, due to the manner in which these drives are formatted, benchmark tests that

include command overhead or measure logical seeks may produce results that vary from these

specifications.

2.6 Start/stop times

1000 and 750GB models 500, 320, 250 and 160GB models

Power-on to Ready (typ / max sec)

<10.0

<8.5

Standby to Ready (typ / max sec)

<10.0

<8.5

Ready to spindle stop

(typ / max sec)

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 13

2.7 Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 2 on page 22.

2.7.1 Power consumption

Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on

n average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 25°C ambient

temperature.

• Spinup power

Spinup power is measured from the time of power-on to the

time that the drive spindle reaches operating

speed.

• Read/write power and current

Read/write power is measured with the heads on track, based

on a 16-sector write followed by a 32-ms

delay, then a 16-sector read followed by a 32-ms delay.

• Operating power and current

Operating power is measured using 40 pe

rcent random seeks, 40 percent read/write mode (1 write for each

10 reads) and 20 percent drive idle mode.

• Idle mode power

Idle mode power is measured with the drive up to spee

d, with servo electronics active and with the heads in

a random track location.

• Standby mode

During Standby mode, the drive accepts commands, but th

e drive is not spinning, and the servo and read/

write electronics are in power-down mode.

Table 4: DC power requirements

Power dissipation (2-disk values shown) Avg (watts 25° C) Avg 5V typ amps Avg 12V typ amps

Spinup — — 2.0 (peak)

Idle* † 5.0 0.168 0.337

Idle* † (with offline activity) 5.40 0.153 0.387

Operating 6.57 0.496 0.341

Standby 0.79 0.35 0.01

Sleep 0.79 0.35 0.01

Table 5: DC power requirements

Power dissipation (1-disk values shown) Avg (watts 25° C) Avg 5V typ amps Avg 12V typ amps

Spinup — — 2.0 (peak)

Idle* † 4.60 0.378 0.224

Idle* † (with offline activity) 4.50 0.250 0.240

Operating 6.19 0.656 0.243

Standby 0.79 0.35 0.01

Sleep 0.79 0.35 0.01

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

†5W IDLE with DIPLM Enabled

14 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

2.7.2 Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on

the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

• Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave

injected noise at up to 10MHz.

• Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave

injected noise at up to 10MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write

current.

2.7.3 Voltage tolerance

Voltage tolerance (including noise):

5V +10% / -7.5%

12V +10% / -7.5%

2.7.4 Power-management modes

The drive provides programmable power management to provide greater energy efficiency. In most systems,

you can control power management through the system setup program. The drive features the following

power-management modes:

• Active mode

The drive is in Active mode during the read/write and seek operations.

• Idle mode

The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disk

access is necessary.

• Standby mode

The drive enters Standby mode when the host sends a Standby Immediate command. If the host has set

the standby timer, the drive can also enter Standby mode automatically after the drive has been inactive for

a specifiable length of time. The standby timer delay is established using a Standby or Idle command. In

Standby mode, the drive buffer is enabled, the heads are parked and the spindle is at rest. The drive

accepts all commands and returns to Active mode any time disk access is necessary.

•Sleep mode

The drive enters Sleep mode after receiving a Sleep command from the host. In Sleep mode, the drive buf-

fer is disabled, the heads are parked and the spindle is at rest. The drive leaves Sleep mode after it

receives a Hard Reset or Soft Reset from the host. After receiving a reset, the drive exits Sleep mode and

enters Standby mode with all current translation parameters intact.

• Idle and Standby timers

Each time the drive performs an Active function (read, write or seek), the standby timer is reinitialized and

begins counting down from its specified delay times to zero. If the standby timer reaches zero before any

drive activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the

drive accepts all commands and returns to Active mode when disk access is necessary.

Power modes Heads Spindle Buffer

Active Tracking Rotating Enabled

Idle Tracking Rotating Enabled

Standby Parked Stopped Enabled

Sleep Parked Stopped Disabled

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